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120378 (2005 QL9)
Classification: Main-belt Asteroid          SPK-ID: 2120378
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1939338577516797 5.1566e-08  
a 2.662980728807432 1.4705e-08 au
q 2.146538602951427 1.3714e-07 au
i 6.443121725468544 5.6943e-06 deg
node 12.48678893280637 3.9087e-05 deg
peri 327.0051188667101 4.0856e-05 deg
M 192.8685598834114 1.2493e-05 deg
tp 2459937.395860448773
(2022-Dec-23.89586045)
5.7648e-05 TDB
period 1587.268736370014
4.35
1.3147e-05
3.599e-08
d
yr
n .2268046939696538 1.8786e-09 deg/d
Q 3.179422854663437 1.7556e-08 au
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      9475 days (25.94 yr)  
   first obs. used      1995-03-29  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59426  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:10  

Additional Information
 Earth MOID = 1.13981 au 
 Jupiter MOID = 2.23215 au 
 T_jup = 3.349 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457230.5 (2015-Jul-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1951940242082086 5.1992e-08  
q 2.142257915688092 1.3845e-07 au
tp 2456758.135864736326
(2014-Apr-10.63586474)
4.9844e-05 TDB
node 12.54931215077541 3.9112e-05 deg
peri 326.159261103114 4.0826e-05 deg
i 6.445809628820518 5.692e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      9475 days (25.94 yr)  
   first obs. used      1995-03-29  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59426  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:10  

Additional Information
 Jupiter MOID = 2.23215 au 
 T_jup = 3.349 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.703206149028195E-15 -7.172581542211396E-15 6.364646663317554E-13 -7.748447150369752E-15 8.083315560109742E-14 4.260882035836837E-16
q -7.172581542211396E-15 1.916882535906265E-14 -1.671283576103891E-12 2.087833402293542E-14 -2.021225990043385E-13 -1.073544367931766E-15
tp 6.364646663317554E-13 -1.671283576103891E-12 2.484437267601702E-9 -2.84230665856353E-12 5.946370190304468E-10 -1.543205371974653E-12
node -7.748447150369752E-15 2.087833402293542E-14 -2.84230665856353E-12 1.529730621209816E-9 -1.519990258322628E-9 -1.398002390868237E-11
peri 8.083315560109742E-14 -2.021225990043385E-13 5.946370190304468E-10 -1.519990258322628E-9 1.66674692562639E-9 1.348755927282766E-11
i 4.260882035836837E-16 -1.073544367931766E-15 -1.543205371974653E-12 -1.398002390868237E-11 1.348755927282766E-11 3.239849419974888E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.42   n/a E2021B55  

120378 (2005 QL9)          Discovered 2005-Aug-25 by NEAT at Palomar
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

Alternate Designations
 2005 QL9 = 1995 FB18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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